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A. M. SHU RTLEFF, 0F BOSTON; MASSACHUSETTS. Letters Patent No. 71,799, dated .December 3, 1867.

IMPROVEMENT IN SALIVA-PUMPS.

Y 'ro ALL WHoM IT MAY ooNoEnN:

Be it known that I, A. M. SI-IUBTLEFF, ofv Boston, in the county of Sulolk, and State of Massachusetts, have invented an improved Saliva-Pump; and I do hereby declare that the following, taken in connection with -the drawings which accompany and`form part of this specification, is a description of my invention suicient to enable those skilled in the art to practise it. ,4 l

The invention relates Lto the construction of saliva-pumps, used in dental operations tokeep the mouth' of the patient free from fluid secretions, without necessity of placing absorbents therein.

These instruments, as heretofore made, have been either very expensive or ineilic`ient, and my object has been to produce an instrument, which, while being cheap and simple in construction, should furnish areliable means of discharging the saliva. For this purpose I use for the suction-pipe a long, rigid, hard-rubber tube,

the upper end oi' which is bent over or reversed, and terminates in a perforated induction-bulb, while the oppo-4 site end of such tube is connected with an elastic bulb, having at each end a valve, one ofwhich valves sepa# rates it from the induction-tube, and the other from a ilexible pipe, which leads into a. suitable saliva-receptacle.

iIt is in the employment of the reversed hard-rubber induction-tube, and in the combination with the rigid induction-tube of a valvular. elastic bulb, and ilexible eduction-pipe, that my invention consists, as also in a provision forattachment of the eduction-pipe to the vessel which receives the saliva.

The drawing represents a salivalpump embodying my invention.

a denotes a hard-rubber tube, tapering towards its upper entf, which end is bent over and projects downward, terminating in a suction or induction mouth-bulb7 b. Attached to the large or lowe:` end of this rigidrubber tubev a is an' elastic bulb or pump, c, provided at each end with a suitable valve, d, the upper one of which. con trols the opening of the bulb into the tube a, while the. lower one controls the opening of a ilexibl'e' dischargepipe, e, into the bulb. The pipe e is a long, flexible pipe, the end of which is connected with or opens into -a vessel or Vreceptaelehf, which may be provided with a spittoon, g. To prevent the pipee from being dislodged or accidentally disconnected from the vesself, the pipe, near vits end, is provided with a ring or ange,vh, whichsets into a groove made in the edge of thel vessel f, the cover of the vessel shutting down over this ange, and. preventing it from rising, the presence of the flange in the groove thus preventing any accidental ,withdrawal of the discharge-pipe from the disehargefvessel.

By connecting the elastic vbulb c directly with the rigid mouth-'tube at one end, and with the ilexible dischargepipe at its other end, with suitable valves to control the passages, the instrument is not only made very simple, both in its construction and operation, but it is easy to keep clean, is-free from surfaces which can become clogged with solid matter, and is much more elicient in relieving the 'mouth of saliva thanany pump now in use.

I claim combining with the suction or mouth-piece of the saliva-pump, an elastic valvular pump or bulb,

connected at one end to the mouth-pieeeby a rigid tube, and having attached to its opposite end a-iexibleV i pipe leading to the saliva-vessel, substantially as shownand described,

I also claim making the induction or suetionend of lthe pump of' hard rubber, or equivalent material, subi vstantially as described. V

I also claim so connecting the discharge-pipe with the saliva-vessel, by means substantially suohas described, that it cannot be withdrawn' therefrom by the working or movements of the pump. A. M. 'SHURTLEFFA Witnesses:

FRANCIS Gouw, L. H. Lamme. 

